The GUK lists the holdings of the Göttingen State and University Library (SUB Göttingen) and departmental libraries of the University of Göttingen. As a rule, book or journal articles are not included.

The GBV Union Catalogue (GVK) comprises the holdings of libraries in ten German federal states as well as of the Staatsbibliothek zu Berlin and further institutes. As a rule, all titles listed can be ordered via inter-library loan within Germany.